- Size 18310 tilt-wash upper sash without grille grommets.
- For units manufactured after May 24, 2010 to August 2017 with interior removable grilles using chisel style fastener - see image above.
- 310 upper sash height increased by 1/2 inch in 2017.
- Terratone exterior with a patented Flexacron® * finish and an unfinished pine interior.
- Low-E glass provides outstanding performance for climates where both heating and cooling costs are a concern.
- Visible glass dimensions are 15" wide by 19 15/16" high.
Flexacron® is a trademark of PPG Industries, Inc.
